Amino-aliphatic sulphonamides and process for preparing them



Patented Dec. 26, 1939 AMlNO-ALIPHATIC SULPHONAMIDES PROCESS FOR PREPARING THEM AND Walter G. (Jhristiansen, Glen Ridge, N. 1., as-

signo'r to E. It. Squibb & Sons, New Yor N. Y., a corporation of New York d No Drawing.

Application November 27, 1937, Serial,No.1'l6,889 Y 11 Claims. (01.260-556) .'1 "his invention relates to, and has for its object the provision of, certain amino aliphatic sulphonamides and a process of preparing them.

These compounds are useful as chemotherapeu- 5 tic agents, especially for combating invasions of streptococci and other-cocci.

The compounds embraced by this invention comprise: amino-aliphatlc-sulphonamides' of the general formula N-X-BOr-haiozen water.

The free base'may be recovered as such or in the form of its acid-addition salt, e. g., hydrochloride, sulphate, lactate, tartrate, borate, nitrate, pic-' rate,- citrate, or phosphate.

--The following example is' illustrative of the invention: v

A. 300 grams of N-(fi-bromoethyli-phthalimide {preferablyprepared by the method of Salzberg, Organic Syntheses, volume 7, page9] is dissolved in 800 cc. of 95% alcohol and 18 cc. 1

To this solution is added dropwise, during a period of about 2 /2 hours, a solution of 166 grams of anhydrous "sodium sulphite in 660 cc. of water,'while refluxing and stirring. The resulting mixture is refluxed for 4 or 5 hours after this addition has been completed, after which it is distilled to dryness. Then, after extractingthe undesirable by-products therefrom with alcohol, the residue is taken up in 600 cc. of water. This solution is gradually evaporated to about V5 of its volume, and the sodium salt of fl-phthalimido ethyl-sulphonicacid which progressively crystallizes out during this evaporation is filtered off. The yield of product thus substantiallyv freed from sodium bromide is about 30%. I

B. 64.5 grams of the sodium salt of pephthalimido-ethyl-sulphonic acid is mixed with 146.5

' grams of PClc. After standing minutes, this mixture is heated two hours at 100 C. After cooling this reaction mixture, the p-phthalimido- 30' ethyl-sulphonyl-chloride is extracted with henzene and isolated in about 75% yield by removal of the benzene solvent by distillation.

C; Asolution of 45.5 grams of ,s-phthailmid'o ethyl-sulphonic-chloride is added to 250 cc. of 85 benzene saturated with ammonia at 5 to 15 6., through which gaseous ammonia is continually passed to keep it'saturated. The solid product which separates is dissolved. in about a liter of hot water from which it crystallizes on cooling. 40 Ayield of about 30% of fi-phthalimido-ethylsulphonamide melting at 201-201? C. (uncor- 'rected) is obtained.

D. To 12.! grams-of p-phthalimido-ethyl-sulphonamide is added an equimolecular quantity (6 grams) of 42% aqueous hydrazine hydrate solution and .145; cc. of 95% alcohol. After refluxing about 30 minutes, the mixture is acidified to Congo red with dilute H01, and the alcohol distilled 011 in vacuum. Then '75 cc. of 35-37% aqueous HCl is added, and this mixture refluxed with stirring until'ali of the solid material has dissolved. Upon cooling, acrystalline material, which is lam phthalic acid, separates and is filtered off. The filtrate is distilled to dryness in Bl the . above]; e.

vacuum and the residue is recrystallized from methanol. A 50% yield of p-amino-ethyl-sulphonamide hydrochloride, melting at 132.5 tov droxy-alkylamine, respectively, in place of the ammonia in reaction ((1) above; for example, by using methylamine, diethylamine, diethanolamine, or propanolamine, the compounds obtained are respectively p-arnino ethyl (N-methyl) sulphonamide, ,B-amino-ethyl (N-diethyli sulphonamide, B-dmino-ethyl (N-di-hydroxyethyi). sulphonarnide, and ,s-amino-ethyl (N-hydroxypropyl) sulphonamide. Compounds wherein either or both of R' and R" are alkyl groups instead of hydrogen may be prepared from the corresponding non-alkylated compounds by alkylating in conventional manner [conversion (E) phonamide may be prepared by treating fi-amino-ethyl-suiphonamide with dimethyl sulphate. Maniiestly, any combination of the radicals X, R, R", R' and R"" may be varied from those of the specific example by these procedures.

The free bases may be isolated from the acidaddition salts of the amino-aliphatic-sulphonamides by customary methods, e. g. by alkalinizing an aqueous solution of the salt with a large excess of potassium carbonate, extracting the liberated base with ether, andremoving the ether by* evaporation. Conversely, the free bases can be converted into acid-addition salts by neutralizing a solution of the base in a suitable solvent (e. g. methanol) with the desired acid, and isolating the salt by crystallization or by removing the solvent by evaporation.

The invention may be variously otherwise embodied, within the scope of the appended claims.

I claim: 1. A compound of the group consisting of:

amino-aliphatic-sulphonamides oi the general Ell)! 3" wherein X is an aliphatic hydrocarbon group having no more than six carbon atoms, R and R" represent each a member of the group consisting of hydrogen, lower alkyl and hydrom-(lower allwl), and R' and R."" represent each a member of the group consisting of hydrogen and lower alkyl; and acid-addition salts thereof. I 2. An amino-aliphatic-sulphonamide oi the eneral formula Bill I B" wherein X is aliphatic-hydrocarbon group N-dimethyl-p-amino-ethyl-sulhaving no more than six carbon atoms, R and R" represent each a member of the group consisting of hydrogen, lower alkyl and hydroxy- (lower alkyl), and R and R"" represent each a member oi. the group consisting of hydrogen and lower alkyl.

3. An' amino-aliphatic-sulphonamide -of the general Iormula wherein X is an aliphatic hydrocarbon group having no more than-six carbon atoms, and R and R" represent each a member of the group consisting of hydrogen, lower alkyl and hydroxy- (lower alkyl) 4. An amino-aliphatic-sulphonamide oi the general formula.

Bl NEI1-XSO:N\ El! wherein X is an open-chain aliphatic hydrocarbon group having no more than six carbon atoms,

and R and R." represent each-a member of the group consisting of hydrogen, lower alkyl and hydroxy-(lower sumo.

5. An amino-aliphatic-sulphonamide oi the general formula wherein X is a eycloaliphatic hydrocarbon group havingno more than six carbon atoms, and R" and R" represent each a member of the group consisting of hydrogen, lower alkyl and hydroxy- (lower alkyl).

6. p-amino-ethyl-sulphonamide. '7. Gamma-amino-propyl-sulphonamide. 8. 4-amino-cyclohexane-l-sulphonamide. 9. The process oi preparing compounds of the general formula.

R NH:XSOr-N wherein X is an aliphatic hydrocarbon group having no more than six carbon atoms, and R and R" represent each a member of the group consisting of hydrogen, lower alkyl and hydroxy- (lower alkyl), which comprises reacting a compound of the general formula ir-rem t with-an. alkali metal sulphite, converting the resulting sulphonate into the corresponding sulphonyl halide. reacting the sulphonyl halide with a member of the group consisting o1 ammonia,

alkylamines and hydrow-alkylamines, and con- -verting the resulting phthalimido-aliphaticesul- 'phonamide into the corresponding amino-aliphatio sulphonamlde by hydrolysis.

10. The process of preparing p-amlno-ethylsulphonamide which comprises reacting an N-(e- 'haloethyl) -phthalimide with an alkali metal sulphite, converting the resulting 'sulphonate into aminpalkyi sulphonamides of the general formula the corresponding sulphonyl. halide, reacting the NHzRSOzNI-Iz wherein R is alower alkylene group suiphonyl halide with ammonia, and reacting the having at least two carbon atoms in the chain resulting p-phthaiimido-ethy1-su1phonaxnide with separating the amino and the sulphonani ido hydrazine hydrate. group, and acid addition salts thereof. v:

11. A compound of the group consisting of WALTER G. CHRISTIANSEN. 

